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把内容写如文件的入门级有关问题

日期：2014-05-18　 浏览次数：20678 次

把内容写如文件的入门级问题
<%@   page   contentType= "text/html;   charset=gb2312 "   import= "java.io.* "   buffer= "64kb "%>
<html>  
<body>
<%  
request.setCharacterEncoding( "gb2312 ");
String   content=request.getParameter( "content ");
%>
<%
try
{
PrintWriter   writer=   new   PrintWriter(new   BufferedWriter(new   FileWriter( "C:\\Tomcat\\webapps\\jsp\\test\\test.txt ",true)));
writer.write(content);
writer.close();
out.println( "已经把内容写入到   C:\Tomcat\webapps\jsp\test\test.txt ");  
}
catch(Exception   e)
{
    out.println(e);
    e.printStackTrace();
}
%>

<form   action= "writeFile.jsp "   method=post>
<textarea   name=content   cols=20   rows=5> </textarea> <br>
<input   type=submit   value=提交>
</form>
</body>
</html>
=============================
错误提示：
HTTP   Status   500   -  

type   Exception   report

message  

description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException:   Unable   to   compile   class   for   JSP:  

An   error   occurred   at   line:   8   in   the   jsp   file:   /writeFile.jsp
Invalid   escape   sequence   (valid   ones   are     \b     \t     \n     \f     \r     \ "     \ '     \\   )
5:   request.setCharacterEncoding( "gb2312 ");
6:   String   content=request.getParameter( "content ");
7:   %>
8:   <%
9:   try
10:   {
11:   PrintWriter   writer=   new   PrintWriter(new   BufferedWriter(new   FileWriter( "C:\\Tomcat\\webapps\\jsp\\test\\test.txt ",true)));


Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:435)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:299)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note   The   full   stack   trace   of   the   root   cause   is   available   in   the   Apache   Tomcat/5.5.23   logs.

======================================
请高手指教啊~

------解决方案------------------

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